Data
502,250 items of data are available, covering 429,912 participants, encoded using Data-Coding
100337.
Defined-instances run from 0 to 3, labelled using Instancing
2.
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
423,228 participants, 423,228 items
Instance 1 : First repeat assessment visit (2012-13)
17,566 participants, 17,566 items
Instance 2 : Imaging visit (2014+)
56,470 participants, 56,470 items
Instance 3 : First repeat imaging visit (2019+)
4,986 participants, 4,986 items
Notes
ACE touchscreen question "Over the last 3 months, how often have you used a hands-free device/speakerphone when making or receiving calls on your mobile?"
If the participant activated the Help button they were shown the message:
If you are unsure, please provide an estimate or select Do not know.
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Field 1130 was collected from participants who indicated they have used a mobile phone at least once per week in the past or do not know whether they have used or not, as defined by their answers to Field 1110